Willian has been in red hot form for his club with four goals and six assists this season. But the Brazilian could be set for a spell on the sidelines.

Willian pulled up with a hamstring problem just past the midway mark in the first half.

After treatment from the Chelsea physio, it was decided the 29-year-old would not be able to continue.

And in his place Ross Barkley came on for his Chelsea debut following his £15million move from Everton.

Barkley immediately took position in the front three alongside Eden Hazard and Pedro.

Chelsea play Newcastle in the FA Cup fourth round on Sunday before returning to Premier League action against Bournemouth next week.

Speaking earlier this month Chelsea boss Antonio Conte said Barkley was capable of playing in multiple positions.

Conte said: "He can play in midfield, if we play with three midfielders, or number 10 if we play 3-4-3.

"Before playing we must be sure that he is into our idea of football. 

“Otherwise, it's a problem for him and it's a problem for the rest of the team."